64Kb Add-Only Memory

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Status

This product is Not Recommended for New Designs. Some versions may be No Longer Available or being discontinued and subject to Last Time Buy, after which new orders can not be placed. See Ordering Information for details.

Description

The DS2506 is a 64Kb 1-Wire® EPROM. Like all 1-Wire devices, the DS2506 consists of a factory-lasered 64-bit ROM registration number that includes a unique 48-bit serial number, an 8-bit CRC, and an 8-bit family code (0FH) plus 64Kb of user-programmable EPROM. The power to program and read the DS2506 is derived entirely from the 1-Wire communication line. Data is transferred serially via the 1-Wire protocol which requires only a single data lead and a ground return. The entire device can be programmed and then write protected if desired. Alternatively, the part may be programmed multiple times with new data being appended to, but not overwriting, existing data with each subsequent programming of the device. Note: Individual bits can be changed only from a logical 1 to a logical 0, never from a logical 0 to a logical 1.

Data Sheet

Download	Rev 1	(PDF, 900kB)
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Key Features

65,536 bits electrically programmable read only memory (EPROM)
Unique, factory-lasered and tested 64-bit registration number assures absolute traceability because no two parts are alike
Built-in multidrop controller ensures compatibility with other 1-Wire products
EPROM partitioned into 256-bit pages for randomly accessing packetized data records
Each memory page can be permanently write-protected to prevent tampering
Reduces control, address, data, power, and programming signals to a single data pin
Directly connects to a single port pin of a microprocessor and communicates at up to 16.3kbps
Overdrive mode boosts communication speed to 142kbps
Low-cost PR35 or 8-pin SO surface-mount package
Reads over a wide voltage range of 2.8V to 6.0V from -40°C to +85°C; programs at 11.5V to 12.0V from -40°C to +50°C

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Rev 1; 2000-06-27
This page last modified: 2008-08-01